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Benefit Plans (Tables)
9 Months Ended
Sep. 30, 2023
Retirement Benefits [Abstract]  
Components of Net Periodic Expense (Benefit)
Defined Benefit Pension Plans
Three months ended
September 30,
Nine months ended
September 30,
2023202220232022
Interest cost$863 $681 $2,590 $1,888 
Expected return on plan assets(826)(380)(2,479)(2,599)
Settlement loss22 38 50 38 
Net periodic expense (benefit)$59 $339 $161 $(673)
Other Postretirement Benefit Plan
Three months ended
September 30,
Nine months ended
September 30,
2023202220232022
Interest cost$$$18 $13 
Amortization of prior service credit(31)(53)(94)(158)
Amortization of net loss(1)(2)
Net periodic benefit$(26)$(47)$(78)$(142)